#!/usr/bin/env bash
#
# Sync the canonical .proto files from the st-peter server repo into this
# client repo's proto/ directory.
#
# The st-peter server repo is the SOURCE OF TRUTH for the wire contract.
# This repo vendors copies so the Go / TS / Rust clients can each generate
# stubs without depending on the server's Cargo workspace. Run this whenever
# the server's protos change, then re-run codegen and tag at the SAME version
# as the st-peter release (see VERSION).
#
# Usage:
#   ST_PETER_REPO=/path/to/st-peter-lib ./scripts/sync-protos.sh
# Defaults to ../st-peter-lib relative to this repo.

set -euo pipefail

here="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
ST_PETER_REPO="${ST_PETER_REPO:-$here/../st-peter-lib}"

if [[ ! -f "$ST_PETER_REPO/Cargo.toml" ]]; then
  echo "ERROR: st-peter repo not found at '$ST_PETER_REPO'." >&2
  echo "       Set ST_PETER_REPO=/path/to/st-peter-lib and re-run." >&2
  exit 1
fi

# canonical path in st-peter-lib  ->  filename in proto/
# NOTE: st-peter-admin.proto (the admin surface) and health.proto are
# intentionally NOT vendored — services authenticate users; they do not
# administer st-peter.
protos=(
  "proto/st-peter-auth.proto"
)

dest="$here/proto"
mkdir -p "$dest"
for rel in "${protos[@]}"; do
  src="$ST_PETER_REPO/$rel"
  [[ -f "$src" ]] || { echo "ERROR: missing $src" >&2; exit 1; }
  cp "$src" "$dest/$(basename "$rel")"
  echo "synced $(basename "$rel")"
done

# Keep VERSION in lockstep with the st-peter workspace version.
sp_version="$(grep -m1 '^version' "$ST_PETER_REPO/Cargo.toml" | sed -E 's/.*"([^"]+)".*/\1/')"
if [[ -n "$sp_version" ]]; then
  echo "$sp_version" > "$here/VERSION"
  echo "VERSION -> $sp_version (matched st-peter workspace)"
fi

echo "Done. Re-run codegen (scripts/gen-*.sh) and tag at v$(cat "$here/VERSION")."